Spindle swing for twisting machines



Nov. 13, 1934. o. w. SCHAUM 1,980,358

SPINDLE SWING FOR TWIST'ING MACHINES Filed Dec. 30, 1932 2 Sheets-Sheet 1 I l I 1 s 11": Lil

y D i [/7V6/7 for Nov. 13, 1934. o, w. SCHAUM 1,980,358

SPINDLE SWING FOR TWISTING MACHINES Filed Dec. 30, 1952 2 Sheets-Sheet 2 4% w. sm Invemor Patented Nov. 13, 1934 UNITED STATES PATENT OFFICE Fletcher Works,

Incorporated, Philadelphia,

Pa., a. corporation of Pennsylvania Application December 30, 1932, Serial No. 649,527

10 Claims.

This invention relates to improvements in spindle swings for twisting or spinning machines or the like.

The objects of my improvement are to retain the '6 oil within the bearing, and to hold the whorl clear of the belt when so desired. A further object is to accomplish these results simply and economically.

The preferred form of my invention is shown in 10 the accompanying drawings in which- Figure 1 is a front elevation showing the spindle, spindle swing and the supporting bracket; Figure 2 is a side elevation of the swing bracket with the swing removed; Figure 3 is a vertical 15 section through the lug of the swing; Figure 4 is a plan view of the spindle swing and bracket.

The belt 1 and supporting rods 2 attached to the machine frames, and the spindle structure are common in twisters for silk, rayon and. the

.20 like and need not be described in detail as they form no part of this invention. A cap screw and tapped plate are shown securing the bracket to the rails, but other means could be used. The bracket 3 is bored for, and supports, swing stud 4 upon which swing 5 is secured. ,Swing 5 supports the spindle structure, comprising spindle blade 6, whorl '7, bolster 8, felt washer 9, spring and nut 11. When running the whorl is held against the belt by the spring 12 surrounding the upper portion of the bracket 3. One end of the spring is in a hole'13 in collar 14, the other end is in a hole 15 in the swing 5. As it is very necessary to have all whorls bear with equal pressure against the belt in order that they run at equal speeds and produce uniform twist from all spindles, collar 14 is arranged to be easily adjusted and is held in place securely by set screw 16 which is screwedinto an upstanding lug 1'7 on the bracket 3. Integral with bracket 3 is an ear 18 which is made helical for a purpose to be described later. When the bobbin is doffed, this car cooperates with a lug 19 projecting downwardly from the wing 5. The bracket 3 has a counterbore 20, which is large enough and deep enough to make an oil reservoir capable of containing an appreciable volume of lubricant for the stud 4. Prior practice has been to merely countersink the bore slightly so that the oil enters the bearing easily. The stud 4 or the bore may be made with oil grooves as desired, or recessed to increase the oil capacity. The swing 5 is preferably made with a small upstanding handle 21 for the convenience of the operator.

In spindle swings in common use, the whorl is pulled away from the belt to change bobbins or 5.5, tie up a broken end, and will be urged against the belt by the spring as soon as released by the operator. This is awkward because the operator needs both hands to tie up the ends. An operator on these machines frequently ties one string around her waist and another around one knee Q0 and holds the swing out with a loop of one of these strings while she ties up. Other machines have foot treadles and hand operated cams, either sliding or rotating in bearings to press against the swings and hold them out. These, of course, Q6 add expense to the machine and may slow down production.

When changing bobbins a very considerable pull is required to remove the bobbin from the tapered spindle blade. There is a stop or detent of some kind on the ordinary swing bracket, which engages with a lug on the swing, to prevent the swing stud 4 from being completely withdrawn from its bearing. Prior to this invention the detent or stop allowed approximately one-eighth of an inch vertical motion of the swing before engaging the lug. This was a necessary manufacturing tolerance for machinery of this class, as perfect freedom of rotation is vital to perfect twist. The vertical motion causes the swing stud'4 to act as a pump plunger and suck inair as it israised and then to squirt out oil and air as it goes down again. As a result of this much oil is wasted, the machinery gets very oily on the outside of the spindle bolster, swing and swing bracket, and oil pans must be provided to catch the drip. The operator is hindered because she must avoid these dirty members. The oil pans need to be cleaned periodically and cut off a great deal of light from the lower deck. Also the swing studs become nearly dry and stick fast or get very sluggish and in either case cause slack twist.

In my improved design I replace the conventional stop on the bracket 3 with a broad car 18 which is helical, or wedge shape, and the lug 19 which engages this ear has a slot 22 which is also made at an angle to the horizontal. While the who-r1 is against the belt these two helical or non-horizontal surfaces do not touch each other, and therefore allow the necessary freedom for the swing. When the whorl is pulled clear of the belt the lower surface of slot 22 engages the under side of car 18 and is held fast by it until released by the operator. This wedging action between the two surfaces also presses the stud firmly against the bottom of the bore, so that there can be no relative motion between the bracket 3 and the stud when the bobbin is doffed.

As there is no motion, there can be no pumping 1 0 also very convenient for the operator, as she can disengage the lug and ear with her knee or elbow' while her hands are busy holding the yarn taut and placing the takeup bobbin on the cork rolls.

The foregoing description should be construed as explanatory rather than limiting, as my invention may take many forms and accomplish the same purpose.

I claim:

1. In a machine of the class described a driving belt, a spindlestructure including a spindle blade awhorl and a bolster, 'a spindle swing supporting said spindle structure and having a lug and an upstanding handle integral therewith, a bracket supporting said swing, a collar adjustably secured to the bracket, a spring secured to the collar and urging the whorl toward the belt, in combination with an oil reservoir formed by a counterbore in thejupper end of the bracket, and onthe bracket an ear having an undersurface which is substantially helical and of such small lead that when engaged by the lug of the swing, friction alone retains the whorl away from the belt and prevents the swing from being raised.

2. In a twisting machine, a belt, a bracket having a bore and an oil reservoir and having an. ear with a substantially helicalundersurface, a swing pivoted in the bore of the bracket-and having a lug adapted to engage the undersurface of the ear, a spring mounted so as to urge the swing toward the belt, said helical surface having a lead so small that when engaged by the lug, friction alone is suiiicient to retain the swing in position against the=urge of the spring.

3. Ina twisting machine, spindle driving means, a supporting member having a substantially helical surface, a swing pivoted in the supportingmember and having a portion adapted to engage the helical surface of the supporting member, a spring tending to movethe swing toward the spindle driving means, said helical'surface having so small a lead that friction sufiices to maintain the swing and the supporting member in engagement against the urge of said spring.

4. In combination, a spindle driving belt, a spindle structure including a blade, a'whorl and a bolster, a spindle swing supporting said spindle, a swing studsupporting said swing, a bracket having a bearing for the swing stud and. having a stationary surface inclined to the horizontal, a cooperating member carried by said swing, said member engaging said stationary surface when the spindle is moved away from the belt.

' 5. In combination a bracket having a bore and a counterbore, a collar adjustably secured to the bracket, a spring one end of which is held by the collar, a swing supported by the bracket and attached to the movable end of the spring, and a pair of wedging surfaces holding the swing in a predetermined fixed position.

6. In combination, spindle driving means, a spindle driven by said means, a spindle swing, asupport for thegspindle swing,'anv ear projecting from said support, a cooperating member projecting from the swing, said member and ear constituting friction means to. hold the spindle swing inapredetermined position. I 100 '7. In a. twisting machine, a stud, a swing secured to the stud, a bearing for thestud and. means for pressing the stud downwardly in its bearing while'doffing, said means comprising a stationary inclined surface on the bearing mem ber and a co-operating movable. surface carried by the swing. i .1 m

8. In a machine of the class described,a belt, a spindle swing, a slot in the swing, a bracket supporting the swing, an ear on the bracket, said slot I10 7 and ear becoming cooperative after the swing-has been moved away from the belt and becoming inoperative as the swing is moved toward the belt.

9. Ina machine of the class described, a spindle swing, a spindle. structure carriedtherebyQa swing bearing containing an oil reservoir, and a pair of engaging surfaceswhich hold the swing rigidly while the spindleisin position'to be doifed, one of said engagingsurfaces being stationary. 10. In combination, a spindle swing, a wedging surface movable with'the swing, a swing support, a stationary cooperating wedging surface on the support, the two wedging surfaces being so positionedrthat whenever the surfaces are engaged the swing is held rigidly. 1

- 1 OTTOW. 'SCHAUM. 

